An Irish woman is reported to be in a 'critical condition' after a plane crash in Australia.

A 29-year-old UK woman was killed when a private charter flight crashed on the eastern side of Middle Island about 11am yesterday.

A 21-year-old Irishwoman remains in a critical condition in Brisbane after she suffered head injuries in the crash.

The Department of Foreign Affairs has confirmed it is aware of the crash and is providing consular assistance to the Irish woman's family.

Police say engine failure was the likely cause of a light plane crash near Agnes Waters.

The 64-year-old male pilot suffered spinal injuries. He remains in a critical condition in Bundaberg Hospital.

The fourth passenger, a 13-year-old boy, remains in Rockhampton Hospital with minor injuries.

Tour company 1770 Castaway, which operated the plane, has expressed its sympathies and confirmed it is co-operating with police investigators. “We offer our deepest condolences to the families and all the loved ones of those involved in the Middle Island tragedy,” it said in a statement on its website.